Dont forget that to assemble the thing I had to put the "u-joint" in and
install from under the wing behind the seat back bulkhead. The bearing on
the wing lift bulkhead removes the slop from the micarta wearing. There are
nice flanged bearings available forr wheels from Wicks. 3/4 inch even
-----Original Message-----
From: Dave Morris <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Monday, May 25, 1998 9:51 PM
Subject: Re: DFLY: Eliminating the aileron motion changer
>At 03:56 PM 5/25/98 -0700, Justin Mace wrote:
>
>>The aluminum had touque wind up. I installed 3/4" .035 wall 4130.
>>We did the same test and this time I did see the aileron come to the top.
>>Needless to say I have got a new perspective on the DF control system
>>and some of the things that you will never think of when making changes.
>>
>>Install what ever you like, my choice if I were to do it again would be
>>4130.
>>
>
>and Kevin wrote:
>
>>I went through this also. Look into the strength of both and I think you
>>will stick to the 2024. 2024 is way stronger than 6061.
>
>and Chris wrote:
>
>>I kept the motion mixer but changed to a welded 4130 tube that is jointed
>>just behind the seat back bulkhead with one of those booted U-joints (also
>>welded). Have a ball bearing instead of phenolic at the lift bulkhead.
>>Will probably add a reflexer mechanism per the gene Evans scheme. The
>>U-joint will help here as the reflexer requires up and down travel. Only
>>bolts are where the comtrol stick attach to the torque shaft. Double
bolted
>>here.
>>
>>Very little slop.
>
>So.....
>
>I think I'm going to replace the 3 separate pieces of 2024 tubing called
>for in the plans with a single 4130 tube running from the control stick
>mixer all the way to the aileron bellcrank. I'm not putting dual sticks,
>so I don't need the other bellcrank right behind the intermediate bearing,
>so I should be able to run 3/4" tubing all the way back and end up with
>just 2 joints, and a much stiffer torque tube. According to the specs, it
>looks like it will be about 3 times heavier, but may be a better
>arrangement from the standpoint of reliability and slop avoidance. Thanks
>to all of you for your comments!
>
>
>Dave Morris
>Soon to be N55UP
>PPSEL, Dragonfly, CAF, EAA
>Dragonfly pictures, info, and links at:
>http://www.davemorris.com/dave/dfly.html
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